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To check the bending in micrometer, what is the difference between the measurement of loaded and unloaded conditions for micrometer range 0 to 25 mm?

To check the bending in micrometer, what is the difference between the measurement of loaded and unloaded conditions for micrometer range 0 to 25 mm? Correct Answer 1.5 µm per kg

In loaded and unloaded conditions, Difference between measurements should not exceed 1.5µm, 2µm, 2.5µm and 3µm per kg for the range 0 to 25, 25 to 50, 50 to 75 and 100 mm respectively.

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